Pressure-reducing apparatus.



Patented sept. 3, le'ol. F. KAEFERLE.' PRESSURE BEDUCING APPARATUS.

(Application led May 10, 1901.)

(No Model.)

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UNITED STATES PATENT OFFICE.

FRITZ KAEFERLE, OF HANOVER, GERMANY..

PRESSURE-REDUCING APPARATUS.

SPECIFICATION forming part of Letters Patent N o. 682,085, datedSeptember 3, 1901.

Application tiled May 10, 1901. Serial No. 59,713. {No model.)

To all whom t may concern:

Beit known that I, FRITZ KAEFERLE, a subject of the German Emperor,residing and having my post-office address at Luerstrasse 3, Hanover,Germany, have invented certain new and useful Improvements in orRelating to Pressure-Reducing Apparatus, of which the following is aspecification.

The present invention relates to pressurereducing apparatus.

In the annexed drawings, Figures l and 2 are vertical sections of twoforms of construction.

' The pressure of the pressure agent passing through the said apparatusis reduced or regulated by the rising and falling of a float ct, whichdips into liquid c, closing the pressurechamber b, and thus more or lessopens or closes a double-beat valve which has conical faces d or seats eof exactly or approximately equal diameter and is therefore balanced.AsIis known in such apparatus, the rising and falling of the oat acorresponds to the eX- tent to which the liquid c is forced through thesiphonf into the adjustable vessel g by the overpressure occurring inthe chamber l). In setting the valve or adjusting the apparatus fordierent reduced pressure or on the occurrence of sudden changes in thepres-'f sure in chamber b the surface ofthe liquid receives each time amore or less frequent rising-and-falling motion, which causes the v-alveto strike and beat,` so that if the double-beat valve is notsufficiently shut'o the liquid -c is frequently thrown by overpressureout of the siphon f and the vessel g. To lcounteract this, the movementof the liquid c must be retarded to such an extent that on change ofpressure occurring in the apparatus the movement of the iioat a, andtherefore of the double-beat valve cl, is distributed over a periodwhich is longer than that of the sudden change of pressure. This resultmight be obtain-ed by making the inner diameter of the siphon so smallthat the movement of the liquid in the float vessel would besufficiently slow; but this would greatly increase the friction of theliquid c in the narrow siphon ,f and would, more particularly inapparatus I sensitiveness of the apparatus. Further impurities enteringthe siphon would be Very liable to block same and difficult to remove.For these reasons it is necessary that the siphon f should be ofsufficiently large diameter. By the present invention the necessaryretardation of the motion of the liquid is effected by reducing indiameter or constricting the uniformly-wide siphon f at one or morepoints t-for instance, at the end thereof--in the fioat vessel, thewidth of such reduced parts or constrictions being such that therequired retardation of the motion of the liquid is produced inconsequence of the displaced liquid having to pass through the saidreducedparts. The same result is obtained by reducing in diameter thetube h of the vessel g-for instance, at the lower end of the said tube-or, as shown in the drawings, such constrictions can be arranged atboth places.

In large apparatus through which steam must pass with great speed for along time before it has lled the pipes beyond the apparatus sufficientlyto retard its speed it frequently happens that the steam carries awaypart of the liquid c from the vessel o, so that the action of theapparatus is considerably affected.- In such case the valve d cannotopen sufficiently, since the float a descends immediately the quantityof liquid c is reduced. Consequently the required quantity of steam doesnot pass to the pipes beyond the apparatus and the desired pressure isnot obtained. To prevent this, the vessel'o, containing the liquid, isprovided with a partition m below chamber b, and the valve-rod c, Fig.1, or the lever-rod fw, Fig. 2, passes through the opening n in the saidpartition. The said opening n is just sufficiently large to allow of theequalization of pressure between vessels g and o. The effect produced bythis arrangement is the same as that of the constrictions l that is tosay, the equalization of pressure is retarded, but the free spacesurrounding the rods o or w is so small that the steam or other iuidcannot carry away any portion of the liquid c from vessel o to thepipes. r-lhe action of a pressurereducing apparatus. provided with thepartition m can therefore not be interfered with by great and continuedenergy of the steam or other fluid..

I declare thatwhat I claim is A 1. In a pressure-reducingapparatushaving a doubleebeat valve and a oat connected therewith which float ismovable in a iioat vessel, the combination of a siphon connected with anadjustable vessel, the said s iphon having constrictions at-one or morepoints for the purpose of checking the motion of the liquid in theSiphon on the occurrence of sud-1; den fluctuations of pressuresubstantially as described.

2. Ina-pressureweducing apparat-us having a double-beat valve and afloat connected therewith which float is movablein a float vessel, thecombination of a Siphon connected FRITZ KAEFERLE.

Witnesses:

C. C. STEvENsoN, CARL RAHLFS.

